I am afraid at this point we could have the best and most expensive testing in the world and there would still be disputes. Not saying it is a waste of time or it shouldn't be done. It very much should be as it is the best we can do to keep the community safe and suppliers from scamming. However, I doubt it will cut down on the back and forth very much.
It's much like politics. People will defend their favorite suppliers and spit on others regardless of what evidence is presented to them. We all have biases. I try to be as objective and take emotion and bias out as much as I can, but that can only go so far.
At the end of the day, I know no matter how much sugar I sprinkle on it, due to not being a mutli millionaire, I am stuck with injecting unregulated products from China and are hoping to make the best choice with the info I have.